The following figure shows an equilateral triangle
Chapter 9, Problem 54(choose chapter or problem)
The following figure shows an equilateral triangle inscribed in the unit circle. The point Q lies on the bisector of AOC, and the distance from O to Q is r. Use the distance formula for polar coordinates to show that (QA)(QB)(QC) 1 r 3 (This result also is due to Roger Cotes.)
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer